Chair mat



FIG. 1 is a perspective view of the first embodiment of a chair mat according to this invention;

FIG. 2 is a top view thereof;

FIG. 3 is a perspective view of another embodiment of a chair mat according to this invention; and,

FIG. 4 is a top view thereof.

The dashed lines depict portions of the chair mat that form no part of the claimed design. The break lines show symbolic breaks in the length of the article. 

CLAIM An ornamental design for a chair mat, as shown and described. 